import React, { Component } from 'react'
import './Item.css'
export default class Item extends Component {
    state={
        mouse:false//标识鼠标移入移出
    }
    handleCheck=(id)=>{
        return (event)=>{
            this.props.updatedoto(id,event.target.checked)
        }
      
    }
    handleDelete=(id)=>{
        if(window.confirm('确定删除吗？')){
            this.props.deltodo(id)
        }
        
    }
    handleMouse=(flag)=>{
        return ()=>{
            this.setState({mouse:flag})
        }
    }
    render() {
        const{id,name,done}= this.props
        const {mouse}=this.state
        return (
            <li style={{backgroundColor:mouse ? '#ddd' : 'white'}} onMouseEnter={this.handleMouse(true)} onMouseLeave={this.handleMouse(false)}>
                <label>
                    <input type="checkbox" checked={done} onChange={this.handleCheck(id)}/>
                    <span>{name}</span>
                </label>
                <button onClick={()=>{this.handleDelete(id)}} className="btn btn-danger" style={{display:mouse?'block':'none'}}>删除</button>
            </li>
        )
    }
}
